hey guys, i know this may seem like a stupid question but, Im looking at buying new batterys for the truck, and was woundering what would be the best out there... my dad bought some batterys from the local parts store and at 7 degrees out they didnt start his truck up... maybe its because its a power stroke. i dont wish to have anyone have to go on a batman an robin mission to save me in the cold.... any input would be great